JdeJong
Petroleum
- Oct 14, 2009
- 4
Hi All
I have been asked to perform FEA on trunnions on elbows and develop flexibility factors for incorporating into CAESAR calculations.
I know that the available literature focuses more on SIFs than flexibility, as that is generally of more importance. However, in my particular analyses the trunnion and elbow are directly beneath nozzle of a compressor, so any added flexibility in the system is important because of the loadings it will place on the compressor nozzles. I know that there is current literature that I can use to address the analysis, for example:
mydocs.epri.com/docs/public/TR-107453.pdf
However, it would be great if someone with experience could confirm for me whether FEA of my particular system would produce significantly more accurate flexibility factors than the application of previous analyses. The suction lines are generally NPS 72" with a wall thickness of 19mm. One end of the elbow will also be potentially connected to a flange, which will also produce a stiffening effect! I'm not sure what the discharge line wall thicknesses are off the top of my head, but they are generally NPS 56"
I am a junior piping designer at a company, and currently starting my BEng final year project in mechanical engineering, so apologies for any glaring errors in my post!
Any help is appreciated.
Thanks.
I have been asked to perform FEA on trunnions on elbows and develop flexibility factors for incorporating into CAESAR calculations.
I know that the available literature focuses more on SIFs than flexibility, as that is generally of more importance. However, in my particular analyses the trunnion and elbow are directly beneath nozzle of a compressor, so any added flexibility in the system is important because of the loadings it will place on the compressor nozzles. I know that there is current literature that I can use to address the analysis, for example:
mydocs.epri.com/docs/public/TR-107453.pdf
However, it would be great if someone with experience could confirm for me whether FEA of my particular system would produce significantly more accurate flexibility factors than the application of previous analyses. The suction lines are generally NPS 72" with a wall thickness of 19mm. One end of the elbow will also be potentially connected to a flange, which will also produce a stiffening effect! I'm not sure what the discharge line wall thicknesses are off the top of my head, but they are generally NPS 56"
I am a junior piping designer at a company, and currently starting my BEng final year project in mechanical engineering, so apologies for any glaring errors in my post!
Any help is appreciated.
Thanks.
